added possibility to define the relevant attribute of getDAO

lib/dao-factory-manager.js

@@ -16,9 +16,12 @@ module.exports = (function() {
     })
   }
 
-  DAOFactoryManager.prototype.getDAO = function(daoName) {
+  DAOFactoryManager.prototype.getDAO = function(daoName, options) {
+    options = options || {}
+    options.attribute = options.attribute || 'name'
+
     var dao = this.daos.filter(function(dao) {
-      return dao.name == daoName
+      return dao[options.attribute] === daoName
     })
 
     return !!dao ? dao[0] : null